Product Description
| Specification | ||||||||
| Model | Capacitiy (FAD)M3/min | Power kw | Noise level db | Weight KG | ||||
| 7bar | 8.5bar | 10bar | Water Cooling | Air Cooling | ||||
| OFA1 | OFA15 | 2.4 | 2.1 | 1.8 | 15 | 74 | 1,030 | |
| OFA22 | 3.7 | 3.2 | 2.7 | 22 | 74 | 1,070 | ||
| OFA30 | 4.8 | 4.4 | 4.0 | 30 | 74 | 1,300 | ||
| OFA37 | 5.9 | 5.3 | 5.0 | 37 | 74 | 1,355 | ||
| OFA45 | 7.0 | 6.5 | 6.1 | 45 | 74 | 1,390 | ||
| OFA2 | OFA55 | 9.2 | 7.9 | 7.3 | 55 | 74 | 1,860 | |
| OFA75 | 12.2 | 11.2 | 10.7 | 75 | 74 | 1,935 | ||
| OFA90 | 14.7 | 13.5 | 12.7 | 90 | 74 | 2,000 | ||
| OFA3 | OFA110 | 19.3 | 17.2 | 16.0 | 110 | 74 | 3,660 | |
| OFA132 | 22.9 | 19.5 | 18.8 | 132 | 74 | 3,700 | ||
| OFA4 | OFA160 | 29.4 | 25.7 | 23.8 | 160 | 74 | 5,300 | |
| OFA200 | 36.6 | 33.1 | 30.4 | 200 | 74 | 5,380 | ||
| OFA250 | 44.5 | 41.0 | 37.4 | 250 | 74 | 5,450 | ||
| OFA275 | 47.4 | 43.0 | 41.0 | 275 | 74 | 5,500 | ||
| OFA5 | OFA315 | 51.5 | 47.6 | 46.0 | 315 | 74 | 6,000 | |
| OFA355 | 56.3 | 52.6 | 50.4 | 355 | 74 | 9,050 | ||
| OFW1 | OFW37 | 5.9 | 5.3 | 5.0 | 37 | 74 | 1,355 | |
| OFW45 | 7.0 | 6.5 | 6.1 | 45 | 74 | 1,450 | ||
| OFW2 | OFW55 | 8.8 | 7.9 | 7.3 | 55 | 74 | 1,800 | |
| OFW75 | 11.9 | 11.2 | 10.7 | 75 | 74 | 1,850 | ||
| OFW90 | 14.3 | 13.5 | 12.7 | 90 | 74 | 1,925 | ||
| OFW3 | OFW110 | 19.1 | 17.1 | 16.0 | 110 | 74 | 2,635 | |
| OFW132 | 21.9 | 19.6 | 18.9 | 132 | 74 | 2,760 | ||
| OFW4 | OFW160 | 28.3 | 26.1 | 24.2 | 160 | 74 | 3,850 | |
| OFW200 | 36.1 | 33.1 | 30.4 | 200 | 74 | 4,000 | ||
| OFW250 | 43.1 | 41.0 | 37.0 | 250 | 74 | 4,100 | ||
| OFW275 | 46.4 | 43.0 | 41.0 | 275 | 74 | 4,300 | ||
| OFW5 | OFW315 | 50.9 | 47.6 | 46.0 | 315 | 74 | 6,550 | |
| OFW355 | 56.3 | 52.6 | 50.4 | 355 | 74 | 6,950 | ||
| OFW400 | 62.1 | 57.8 | 55.8 | 400 | 74 | 7,050 | ||
| OFW450 | 76.5 | 71.5 | 63.8 | 450 | 74 | 8,400 | ||
| OFW500 | 83.9 | 78.3 | 73.1 | 500 | 74 | 8,400 | ||
| OFW630 | 102.9 | 95.7 | 89.0 | 630 | 74 | 9,125 | ||
| OFW750 | 122.8 | 109.6 | 101.8 | 750 | 74 | 9,225 | ||
| Company Profile |
ZheJiang Napu compressor Technology Co.,LTD was established in 2012 based in ZheJiang ,specializing in oil-free rotary screw air compressors, offering a wide range of products from airends to compressors .
With over 10 years experience in oil free screw air compressor. NAPU Compressor is compliant with ISO 8573-1, Class 0 standard and audited by TUV Rheinland and China National Quality Inspection Center of Compressor and Refrigerator.
The company is also compliant with ISO 9001:14001 and is CZPT in the domestic market for its quality-driven culture. The oil-free compressors manufactured by the company are used in a variety of sectors including some of our valued clients like CASC-China Aerospace Science Corporation, NORINCO-China North Industries Group, CNNC-China National Nuclear Group, CHANG AN AUTO, SINOPHARM, BYD and CALT and Sino-Chemical etc.
Continuous improvement in productivity and efficiency is our goal, and we continue to offer an extensive services including our own branded oil-free compressor package as well as after-sales services for other leading brands.
| Product Features |
1. In house designed airend
2. 100% oil free air certified by Germany TUV.
3. Double-layer structure to reduce he noise.
4. Air Cooling and Water cooling are available.
5. VSD control are available.
6.Touch Screen PLC with preset running schedule, more intelligent control.
7.OEM&ODM service are accepted
| FAQ |
Q1. Are you trading company or manufacture ?
A: We are professional manufacture of oil free air compressors. More than 20 years of experience in air compressor manufacturing.
Q2. What’s payment term ?
A: T/T, Western Union, Paypal, Credit Card, and etc. Also we could accept USD, RMB, Euro and other currency.
Q3. How about your after-sales service ?
A: 1.We can provide customers with installation and commissioning online instructions.
Q4. How about your warranty?
A: One year for the whole machine and 5 years for screw air end, except consumable spare parts.
Q5. Do you have any certificate ?
A: Yes, we can offer CE ,ISO and certificate as clients’ demande.
Q6. How do you control quality ?
A: 1. The raw materials are strictly inspected
2. Each compressor must pass at least 8 hours of continuous testing before leaving the factory.
Q7.How long could your air compressor be used?
A: Usually, more than over 10 years.
| After-sales Service: | Online Support |
|---|---|
| Warranty: | 12 Months |
| Lubrication Style: | Oil-free |
| Cooling System: | Water Cooling |
| Power Source: | AC Power |
| Cylinder Position: | Horizontal |
| Customization: |
Available
|
|
|---|

How to Choose the Right Air Compressor
An air compressor uses pressurized air to power a variety of tools. They are most commonly used to power nailers and impact wrenches. Other popular uses for air compressors include paint sprayers and impact wrenches. While all air compressors have the same basic construction, their specialty differs. Ultimately, their differences come down to the amount of air they can push. Read on for information on each type of air compressor. These tools are great for many different purposes, and choosing the right air compressor depends on your specific needs.
Electric motor
While purchasing an electric motor for air compressor, compatibility is a key factor. Not all motors work with the same type of air compressor, so it’s important to check the manufacturer’s instructions before purchasing. By doing this, you can avoid wasting money on an incompatible motor. Another important consideration is speed. A motor’s speed is its rate of rotation, measured in revolutions per minute. It is critical that you purchase a motor with sufficient speed to meet the needs of your air compressor.
Typically, an electric motor for air compressor is 1.5 hp. It is ideal for use with medical equipment and metal-cutting machines. It also performs well under continuous operation and offers a high efficiency and energy-saving performance. Moreover, it features an attractive price, making it a good choice for a wide range of applications. If you are looking for a motor for an air compressor, look no further than a ZYS series.
A motor’s protection class indicates how the motor will operate. Protection classes are specified by the IEC 60034-5. These are stated with two digits and represent the protection against solid objects and water. For example, an IP23 rating means that the motor will be protected from solid objects, while IP54 means that it will protect from dust and water sprayed from all directions. It is vital to choose a motor with the correct protection class for your air compressor.
When choosing an electric motor, you should consider whether it’s compatible with the brand of air compressor. Some may be compatible, while others may require advanced electronics skills to repair. However, most air compressors are covered by warranty, so it’s important to check with the manufacturer if the warranty is still in effect before you spend a dime on a replacement. The motor should be replaced if it has failed to perform as designed.
Oil bath
Air compressors require proper lubrication to function efficiently. The piston must draw air with minimal friction. Depending on their design, air compressors can either be oil-lubricated or oil-free. The former uses oil to reduce piston friction, while the latter splashes it on the cylinder bearings and walls. Such air compressors are commonly known as oil-flooded air compressors. In order to keep their oil baths clean, they are recommended for use in locations with high dust levels.
Start/stop control
An air compressor can be controlled by a start/stop control. This type of control sends a signal to the main motor that activates the compressor when the demand for air falls below a preset limit. This control strategy is effective for smaller air compressors and can be useful for reducing energy costs. Start/stop control is most effective in applications where air pressure does not change frequently and where the compressor is not required to run continuously.
To troubleshoot this problem, you need to check the power supply of your compressor. To check the supply side, use a voltage monitor to determine if power is flowing to the compressor. Ensure that the power supply to the compressor is steady and stable at all times. If it fluctuates, the compressor may not start or stop as expected. If you cannot find the problem with the air compressor power supply, it may be time to replace it.
In addition to the start/stop control, you may want to purchase additional air receivers for your air compressor. These can increase the capacity of air stored and reduce the number of times it starts and stops. Another way to decrease the number of starts per hour is to add more air receivers. Then, you can adjust the control to match your requirements. You can also install a pressure gauge that monitors the compressor’s performance.
Start/stop control for air compressors can be complex, but the basic components are relatively easy to understand. One way to test them is to turn the compressor on or off. It is usually located on the exterior of the motor. If you’re unsure of the location of these components, check the capacitors and make sure that the air compressor is not running while you’re not using it. If it does, try to remove the capacitor.
Variable displacement control is another way to adjust the amount of air flowing into the compressor. By controlling the amount of air, the control can delay the use of additional compressors until more required air is available. In addition to this, the device can also monitor the energy used in the compressor. This control method can result in substantial energy savings. You can even save on the amount of electricity by using variable displacement control. It is essential for efficient compressed air systems.
Variable speed drive
A VFD, or variable frequency drive, is a type of electric motor that adjusts its speed to match the demand for air. It is an efficient way to reduce energy costs and improve system reliability. In fact, studies have shown that a 20% reduction in motor speed can save up to 50% of energy. In addition, a VFD can monitor additional variables such as compressor oil pressure and motor temperature. By eliminating manual checks, a VFD will improve the performance of the application and reduce operating costs.
In addition to reducing energy costs, variable-speed drives also increase productivity. A variable-speed air compressor reduces the risk of system leaks by 30 percent. It also reduces the risk of system leaks by reducing pressure in the system. Because of these advantages, many governments are promoting this technology in their industries. Many even offer incentives to help companies upgrade to variable-speed drives. Therefore, the variable-speed drive can benefit many air compressor installations.
One major benefit of a variable-speed drive is its ability to optimize energy use. Variable frequency drives are able to ramp up and down to match the demand for air. The goal is to optimize the pressure and flow in the system so that the best “dead band” occurs between forty percent and eighty percent of full load. A variable-speed compressor will also increase energy efficiency because of its programmability.
A variable-speed air compressor can also be used to control the amount of air that is compressed by the system. This feature adjusts the frequency of power supplied to the motor based on the demand. If the demand for air is low, the frequency of the motor will reduce to save energy. On the other hand, if there is an excess demand for air, the variable-speed compressor will increase its speed. In addition, this type of air compressor is more efficient than its fixed-speed counterpart.
A VFD has many benefits for compressed air systems. First, it helps stabilize the pressure in the pipe network, thereby reducing the power losses due to upstream pressure. It also helps reduce the power consumption caused by fluctuations in upward pressure. Its benefits are also far-reaching. And as long as the air pressure and air supply is properly sized, a VFD will help optimize the efficiency of compressed air systems.


editor by CX 2023-05-16
China wholesaler Dry Oil-Free Silent Screw Air Compressor with Ghh Airend/Mining with high quality
Merchandise Description
Item Description
Complex parameter
1.Why customer select us?
DHH SCREW COMPRESSOR ZheJiang CO.,LTD.with 23 several years old historical past,we are specialised in Rotary Screw Air Compressor.Germany Common and 13 a long time exporting knowledge support us gained a lot more than 30 loyal international agents.We warmly welcome your modest demo order for quality or market place examination.
2.Are you a company or investing organization?
We are expert manufacturer with huge CZPT manufacturing unit in HangZhou,China,with specialist design team.Equally OEM & ODM service can be approved.
3.In which is your manufacturing facility situated? How can I pay a visit to there?
Our manufacturing facility is found in HangZhou Metropolis, ZheJiang Province, China. We can pick up you from ZheJiang , it is about 1 hour from ZheJiang Xihu (West Lake) Dis. Airport to our factory. Warmly welcome to check out us!
four.What is actually your supply time?
380V 50HZ we can delivery the products in fourteen times. Other electricity or other colour we will shipping within 22 times,if urgently buy,pls speak to our sales in progress.
five.How prolonged is your air compressor warranty?
One particular yr for the entire equipment and 2 several years for screw air stop, other than consumable spare elements and we can provide some spare parts of the devices.
six.How does your factory do with regards to top quality manage?
Top quality is every little thing. we always connect excellent significance to top quality controlling from the really beginning to the really conclude. Our factory has obtained ISO9001:2015 authentication and CE certificate.
seven.How long could your air compressor be employed?
Generally, far more than 10 many years.
eight. What’s payment expression?
T/T,L/C,D/P,Western Union,Paypal,Credit history Card,and and so forth.Also we could settle for USD, RMB, Euro and other forex.
nine.How about your buyer support?
24 hours on-line services available.forty eight several hours difficulty solved assure.
10.How about your right after-income support?
(1) Supply clients with installation and commissioning on-line guidelines.
(2) Nicely-qualified engineers accessible to abroad service.
(3) Around the world brokers and soon after provider accessible.
How to Restore and Sustain an Air Compressor
A compressor is a gadget utilised to transfer air from 1 area to one more. Air enters the air compressor through the consumption valve. Within the compressor, the vanes on the interior rotor rotate in an eccentric cavity. The self-altering size arm divides the space into several cavities of different measurements. As the rotor rotates, air fills the cavity. As air flows all around the cavity, it builds pressure and is squeezed out of the compressor output.
Good displacement
Optimistic displacement air compressors use reciprocating pistons to compress air. Gas is drawn in throughout the suction stroke and compressed by relocating the piston in the opposite route. It then discharges the compressed air by relocating it in the opposite route. This variety of air compressor is most commonly identified in cars, refrigerators, and other applications that need high strain. However, it is not as productive as a centrifugal compressor.
Most modern air compressors use good displacement. Good displacement types capture a quantity of air in the compression chamber and distribute it when the pump is operating at highest capability. They are much more economical than their damaging displacement counterparts. Reciprocating screw air compressors are the most common optimistic displacement compressors. The reciprocating screw air compressor adopts a h2o jacket around the cylinder and is usually utilized in processes this sort of as oil drilling.
A bicycle pump is an illustration of constructive displacement compression. Air is drawn into the cylinder and compressed by the transferring piston. A piston compressor operates on the exact same theory, but it makes use of a rotating crankshaft or connecting rod to full the motion of the pistons. There are two types of optimistic displacement compressors: one-acting and double-performing. Equally varieties perform on the very same principle, equally are positive displacement compressors. The variation in between the two types is the force ratio.
In air compression, constructive displacement compression lowers the quantity of the fluid and reduces its viscosity. This results in larger strain ratios and is employed in centrifugal, axial, and scroll compressors. Positive displacement is a typical characteristic of most air compressors. Optimistic displacement compressors offer the very same benefits and are much more strength-successful when utilized to oil-totally free and fuel purposes. This variety of compression is typically the ideal decision for minimal-strain programs.
oil cost-free
If you’re looking for an air compressor for your company, consider an oil-free air compressor. These models supply cleaner, quieter operation than classic air compressors and call for significantly less servicing. They also satisfy ISO Course or Class 1 air purity specifications. Oil-totally free air compressors are also quieter, with fewer moving areas and considerably less noise. These advantages make oil-cost-free air compressors an ideal remedy for numerous commercial programs.
Air purity is critical in numerous industries. Even the tiniest fall of oil can damage creation products or hurt products. The greatest way to find an oil-cost-free air compressor for your enterprise is to contemplate the process and finish merchandise. As air high quality increases, far more and more organizations are turning to oil-cost-free compressors. Some of the benefits and down sides of these air compressors are:
When deciding on an oil-free of charge air compressor, it is crucial to comprehend the terminology used in the industry. Knowing these phrases will make it easier for you to pick the appropriate compressor for your requirements. ACTFM, or actual cubic feet per moment, is an business term for measuring the sum of air pumped in one particular moment beneath rated situations. Even though a basic number, it can be really useful in identifying which variety of air compressor is greatest for your software.
The ISO 8573-1 global normal defines air top quality and offers air purity classifications. The strictest classification is air purity class . Numerous companies declare that oil-free of charge air compressors meet up with this standard. Even so, a class oil-free air compressor does not always indicate that the air is cost-free of contaminants. In simple fact, Course is the benchmark for air purity. Although zero air good quality is the optimum level, that does not indicate it really is entirely oil-cost-free.
double performing
A double-acting air compressor is a system that employs compressed air to make electricity. Its operating principle is dependent on piston and connecting rod. The connecting rod connects the crankshaft to the piston via pins and caps. The piston moves as the piston moves. Rods are typically created of solid carbon metal. In terms of provider and servicing, double-acting compressors need typical vise upkeep and appropriate cleaning.
The displacement of the compressor is a measure of the displacement that the piston can produce in a particular time period of time. Displacement is generally expressed in real cubic toes for each minute. The actual calculation depends on the variety of cylinder and the configuration of the compressor. Single-performing cylinders can have head-conclude or crank-finish displacement, each of which can be calculated employing the displacement equation. A double-performing air compressor will use this equation. 4 and 6 determine the displacement.
Double-performing air compressors have multiple cylinders and are created of forged iron. They are water-cooled and have a mechanical link in between the piston and connecting rod. A double-performing compressor compresses air two times per revolution of the motor. One cylinder moves up, whilst the other cylinder moves down. The piston moves down, permitting air to enter via valve #1. For the duration of the procedure of the compressor, the temperature of the air and gas boosts.
Double-acting air compressors usually have higher stress and are regarded workhorses. Double-performing compressors also attribute intercooling and double compression. As a consequence, these machines are inclined to previous for a longer time than solitary-performing compressors. Its low pace and dual compression make it a workhorse in the compressor market. Double-acting air compressors are workhorses and flexible gadgets.
gasoline tank force switch
You can adjust the strain in the air compressor tank by altering the differential stress. You can turn the mainspring clockwise or counterclockwise to enhance or lessen the force. This valve will open up when the stress is reduced adequate to commence the compressor. If the pressure is way too lower, the valve should be closed. The cut-in and reduce-out pressures must be established to appropriate values. Following adjusting the tank pressure, check the hysteresis of the tank pressure change and established the preferred shutoff pressure.
If the pressure in the tank falls beneath the lower-in level, the tank pressure change have to be changed. You can check the swap with a multimeter. Make sure the switch is not damaged. If you cannot find the change, you can seem at the other sections. If you discover any damaged or lacking elements, you should replace them. In any other case, it may possibly be time to verify the tank stress change. You could need to have to disassemble the compressor and take away the swap.
The fuel tank pressure change is an critical portion of the air compressor. It keeps you educated of the sum of air shipped by the compressor. If your tank or tank is damaged, your readings will be improper. If the stress swap is damaged, it will not purpose properly and result in incorrect readings. Luckily, there are some effortless approaches to fix this. To prevent this from taking place, keep the tank pressure change in very good situation.
When the air stress in the tank drops to the lower-in strain location, the switch enables power to flow via it. This will start the motor and pump of the air compressor. Then, if the stress in the tank rises previously mentioned the reduce-off degree, the change will journey and stop the compressor. This will avoid it from getting above-pressurized. Power circulation will keep on to circulation to the motor. Relying on your compressor model, you can modify the minimize-in and cut-out pressures as essential.
power supply
The electrical power offer of the air compressor is extremely crucial. Most air compressors run on 12 VDC, which is perfect for automotive use. Alternatively, you can get a switching energy provide for around $twenty. No subject which electrical power supply you pick, you have to ensure that it can support the highest existing of the compressor. You can find energy provides in all measurements, from quarter-horsepower to 5-horsepower.
The voltage needed for a three-section air compressor will fluctuate. 3-phase air compressors demand 3 different electricity cords and a a few-phase electrical services panel. This is simply because a common 120/240-volt electrical service panel is not enough to electricity a 3-period compressor. In addition, three-stage compressors demand 3 individual isolated wires for the engine and motor circuits. 3-section compressors do not require a neutral wire.

